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https://issues.apache.org/jira/browse/HADOOP-8240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497130#comment-13497130
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Kihwal Lee commented on HADOOP-8240:
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Thanks, Uma for pointing this out. I will take a look and file a jira if
necessary. BlockScan on those blocks become less useful as you said, but it may
still cover certain rare failure modes. Anyways, we may be able to optimize it.
> Allow users to specify a checksum type on create()
> --------------------------------------------------
>
> Key: HADOOP-8240
> URL: https://issues.apache.org/jira/browse/HADOOP-8240
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 0.23.0
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Fix For: 0.23.3, 2.0.2-alpha
>
> Attachments: hadoop-8240-branch-0.23-alone.patch.txt,
> hadoop-8240.patch, hadoop-8240-post-hadoop-8700-br2-trunk.patch.txt,
> hadoop-8240-post-hadoop-8700-br2-trunk.patch.txt,
> hadoop-8240-trunk-branch2.patch.txt, hadoop-8240-trunk-branch2.patch.txt,
> hadoop-8240-trunk-branch2.patch.txt
>
>
> Per discussion in HADOOP-8060, a way for users to specify a checksum type on
> create() is needed. The way FileSystem cache works makes it impossible to use
> dfs.checksum.type to achieve this. Also checksum-related API is at
> Filesystem-level, so we prefer something at that level, not hdfs-specific
> one. Current proposal is to use CreatFlag.
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